Ƙofofin wuta na ƙarfe (ciki har da kofa ɗaya, kofa biyu, kofa biyu) galibi ana yin su ta hanyar zanen saman. Ana iya raba kofofin wuta na ƙarfe zuwa ma’auni uku: A, B, da C bisa ga kauri daban-daban. Mafi girman ma’auni, mafi kyawun sautin sauti da zafi na ƙofar wuta.

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